• 분석과학
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• 제16권4호
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• pp.333-338
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• 2003

Inclusion selectivity of a three-dimensional piperazine-ligated cyanocadmate host complex, $[Cd_x(CN)_{2x}\{HN(CH_2CH_2)_2NH\}_y]{\cdot}zG$, has been investigated for benzene (B), toluene (T), ethylbenzene (E), o- (O), m- (M), and p-xylene (P) isomers as the aromatic guest molecules. From the binary, ternary and quarternary guest mixtures of E and xylene isomer (X), the order of inclusion selectivity in the host complex is O>E>P>M. From the binary to quinary BTX mixtures, the order of preference in the complex is seen to be B>T>O${\gg}$P>M.

• 대한화학회지
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• 제40권7호
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• pp.509-514
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• 1996

3차원 금속착체 포접화합물 $Cd(pn)Ni(CN)_4{\cdot}0.5NO_2C_6H_5$(pn: 1,2-diaminopropane=propylenediamine)은 사방정계 공간군 $Pn2_1$a로, a=13.868(5), b=26.591(4), c=7.840(1)${\AA}$, V=2891(1)${\AA}^3$, Z=4이며, 28000개의 독립적인 회절반점에 대한 R값은 0.054이다. 이 포접화합물의 host구조는 가지 달린 지방족 guest 분자를 포접한 포접화합물의 host 구조(T-type)와 같다. Nitrobenzene guest 분자는 T-type의 nodal형 턴넬속에 안정하게 포접되는데, 이는 node 위치체 pn-amino group이 놓이고, antinode 위치에 부피가 큰 방향조 고리가 놓이며, 이들 사이에 극성인 nitro group이 있기 때문이다. 턴넬형의 포접골간을 갖는 금속착체 $Cd(pn)Ni(CN)_4$의 host 구조가 가지 달린 방향족 guest 분자를 포접하고 있다.

• Mass Spectrometry Letters
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• 제6권1호
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• pp.17-20
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• 2015

Sesamin, one of the lignans in sesame seed, was a labile compound in MS and it was reported that the protonated molecule of sesamin decomposed easily in ES ionization process and it cannot be detected (G. Yan, et al., Rapid Commun Mass Spectrom. 2007, 21, 3613-3620). To protect labile compounds, an amino-cyclodextrin (NCyD) was added to the sample to promote the host-guest interaction complex in ESI-MS. As a result, sesamin was ionized as the NCyD-sesamin-NCyD (1:2) complex without undesired decomposition, suggesting that the amino-CyDs assist the ionization of the labile molecules capped with CyDs by host-guest interaction and these compounds were ionized without their decomposition, those are like amino-CyD complex-assisted ionization. The amino-CyD complexes of sesamin and sesamolin were also analyzed by their ion-mobility MS.

• 대한화장품학회지
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• 제15권1호
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• pp.51-62
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• 1989

Inclusion complex formation of octyldimethl p-aminobenzoate with $\beta$-cyclodextrin in aqueous solution and in the solid state was studied by the solubility method, spectroscopic(UV, FT-lR) and X -ray diffractometry. The solid complex of octyldimethy p-aminobenzoate with $\beta$-cyclodextrin was obtained in molar ratio of 1 : 2(guest/host). A spatial relationship between host and guest molecule was clearly reflected in the magnitude of the apparent stability constant (K') and in the stoichiometry of the inclusion complex. Furthermore, a typical type Bs phase-solubility diagram was obtained for octyldimethyl p-aminobenzoate and p -cyclodextrin in water at $25^{\circ}C$. The results indicated that the solubility of the guest molecule was higher by the formation of $\beta$-cyclodextrin inclusion complex.

• 한국응용과학기술학회지
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• 제6권1호
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• pp.59-66
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• 1989

Inclusion complex formation of octyldimethyl p-aminobenzoate with ${\beta}-cyclodextrin$in aqueous solution and in the solid state was studied by the solubility method, spectroscopic (UV, FT-IR) and X-ray diffractornetry. The solid complex of octyldimethyl p-aminobenzoate with ${\beta}-cyclodextrin$ was obtained in molar ratio of 1:2 (guest/host). A spatial relationship between host and guest molecule was clearly reflected in the magnitude of the apparent stability constant (K') and in the stoichiometry of the inclusion complex. Furthermore, a typical type Bs phase-solubility diagram was obtained for octyldimethyl p-aminobenzoate and ${\beta}-cyclodextrin$ in water at $25^{\circ}C$. The results indicated that the solubility of the guest molecule was higher by the formation of ${\beta}-cyclodextrin$ inclusion complex.

• Bulletin of the Korean Chemical Society
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• 제34권2호
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• pp.399-405
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• 2013

Two series of new green phosphorescent polymers bearing a bis(2-phenyl-pyridine)iridium(III)(dibenzoylmethane) [$(ppy)_2Irdbm$] complex were designed and synthesized. Poly-carbazole (PCbz) derivative or polyfluorene with pendant carbazole groups (PFCbz) were employed as host polymers for the iridium complex. The iridium complex monomer was copolymerized with the host monomers using varying monomer ratios via a Yamamoto coupling reaction. Efficient energy transfer from host to dopant unit was observed by increasing the ratio of the iridium guest in the copolymers. Electroluminescent devices with the configuration ITO/PEDOT:PSS/polymer/BmPyPB/LiF/Al were fabricated and characterized. The phosphorescent polymers composed of the iridium complex guest and polyfluorene with carbazole pendants as a host performed better than the polymers composed of the same guest and the main chain polycarbazole host. A maximum external quantum efficiency of 0.73%, a luminous efficiency of 1.21 cd/A, and a maximum luminance of 372 $cd/m^2$ were obtained from a device fabricated using one of the synthesized copolymers.

• 대한화학회지
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• 제38권6호
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• pp.435-441
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• 1994

3차원 금속 착제, Cd(pn)Ni(CN)4를 host로 하는 포접 화합물을 합성하고, X-선 회절 데이타를 이용한 단결정의 구조해석을 하였다. 결정학적 데이타는 다음과 같다. $[Cd(pn)Ni(CN)_4]{\cdot}0.5(CH_3COCH_3{\cdot}H_2O)$, Fw = 387.35, Orthorhombic, $Pn2_1a$, a = 13.950(3) $\AA$, b = 26.713(7) $\AA$, c = 7.628(1) $\AA$, V = 2843(1) $\AA^3$, Z = 4, $D_x=1.81 gcm^{-3}$, $\mu(MoK{\alpha})$ = $28.153cm^{-1}$, T = 297K, 3521개($F_0>3{\sigma}(F_0)$)의 회절 강도에 대한 최종 신뢰도 인자 R = 0.0418이 얻어졌다. 이 포접 화합물은 thiourea 포접 화합물과 유사한 턴넬형의 포접 공간(T-type)을 형성하며, 이런 포접공간 내에 분자당 0.5개의 아세톤과 물분자를 guest로서 받아 들인다. 표제의 포접 화합물은 이미 보고된 바와 같이, 가지달린 유기 guest분자가 host의 기하구조를 T-type으로 이끈다고 하는 host 선택성에 대한 또 하나의 증거가 된다.

• 공업화학
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• 제29권5호
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• pp.519-523
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• 2018

사이클로덱스트린(cyclodextrin)은 환형다당류(cyclic oligosaccharide) 분자들의 일종으로서, 독성을 거의 지니지 않으며, 다른 분자를 포획할 수 있는 기능을 갖고 있다. 따라서, 이 분자들은 유해물질이나 유독가스를 제거하는데 활용되어 왔다. 본 연구에서는, 이 분자들이 다른 분자를 포획하여 host-guest 화합물을 형성할 수 있다는 점에 착안하여, 이 화합물의 생성 시에 수반되는 전기화학적 변화를 감지하는 방법론을 탐구하고자 한다. 먼저, host-guest 화합물의 형성은 자외선 분광기를 통해서 고찰한다. 사이클로덱스트린의 농도를 바꿔가면서 화합물의 형성을 모니터링한다. 그리고, 실질적인 검출은 금전극에 표면 처리 과정을 거쳐 사이클로덱스트린 분자를 도입하고, 이 전극에 모델분자인 메틸파라벤(methyl paraben)을 도입하여 전기화학적 변화를 감지하는 방식으로 도모하였다. 그 결과, host-guest 화합물 형성 시에 전하의 전이가 일어나고, 이를 전기화학적 측정 방식으로도 검출할 수 있다는 가능성을 실험적으로 보여주었다. 이는 무독성 분자인 사이클로덱스트린의 활용도를 넓힐 수 있는 의미있는 결과로 기대된다.

• Bulletin of the Korean Chemical Society
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• 제22권11호
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• pp.1248-1254
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• 2001

The conformations and energies of p-tert-butylcalix[4]crown-6-ether (1) and its alkyl ammonium complexes have been calculated by ab initio HF/6-31G quantum mechanics method. The cone conformation was found to be most stable for free host 1. We hav e determined the binding site of these host-guest complexes focusing on the crown-6-ether or p-tert-butylcalix[4]arene pocket of the cone conformation of host molecule 1. The primary binding site of host 1 for the recognition of alkyl ammonium guests was confirmed to be the central part of the crown moiety of cone conformation. The complexation energy calculations revealed that the ammonium cation without alkyl group showed the highest complexation efficiency when combined with host 1, that is in satisfactory agreement with the experimental results.

• 분석과학
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• 제15권1호
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• pp.31-35
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• 2002

${CIO_4}^-$ 이온만을 선택적으로 감지하는 새로운 수용체가 개발되었다. $[Pd(Me_4en)(Py_2S){\cdot}2ClO_4]_4$ ($Me_4en$ = N,N,N'N'-tetraethylethylenediamine; $Py_2S$ = 4,4'-dipyridyl sulfide) 착화합물에서 주-객 화학종 간의 고감도 작용력을 연구하였다. $Py_2S$의 피리딜 기는 온도, 농도, 매개체 등에 아주 민감한 두 가지의 셋트의 $^1H$ NMR, 공명 시그날을 보여주었다. 이러한 NMR 거동을 수용액에서 고리 사합체의 양이온과 ${CIO_4}^-$ 음이온 간의 정기적 인력에 의한 평형 때문인 것으로 해석되었다.